According to the positive-incentive theory, the main cause of hunger in food-replete environments is

the presence or anticipation of food

Explanation:

Positive-incentive theory, is the anticipated pleasure that comes from eating a certain food or drinking a specific beverage. According to my research on this theory, I can say that based on the information provided within the question the main cause is actually the presence or anticipation of food. Always expecting a specific food or drink that is not available.

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answer; the values, beliefs, and assumptions about appropriate behavior that members of an organization share;